var IE6Hack = Class.create({
	
	initialize: function () {
		this.IE = (navigator.appVersion.indexOf("MSIE")!=-1) ?true :false;
		this.IE6 = (navigator.appVersion.indexOf("MSIE 6")!=-1) ?true :false;
	},
	
	pngFix: function (pixGifUrl) {
		if (this.IE6) {
			for (var i=0;i<document.images.length;i++) {
				var imgs = document.images[i];
				this.pngFixItem(pixGifUrl,imgs);
				imgs.style.visibility = "visible";
			}
		}
	},
	
	pngFixItem: function (pixGifUrl,img) {
		if (this.IE6) {
			if (img.src.substring(img.src.length-3,img.src.length)=="png") {
				img.style.height = img.style.width = "";
				img.style.height = img.offsetHeight + "px"; img.style.width = img.offsetWidth + "px";
				img.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src=" + img.src + ",sizingMethod='scale')";
				img.src = pixGifUrl;
			}
		}
	},
	
	pngFixRoll: function (img) {
		if (this.IE6) {
			Event.observe(img,"mouseover",this.pngRoll.bindAsEventListener(this,0,1));
			Event.observe(img,"mouseout",this.pngRoll.bindAsEventListener(this,1,0));
		}
	},
	
	pngRoll: function (e,toReplace,replaceBy) {
		Event.element(e).style.filter = Event.element(e).style.filter.replace("-"+toReplace+".png","-"+replaceBy+".png");
	},
	
	fixLayerWithFrame: function (obj,frameName) {
		if (this.IE&&!$(frameName)) {
			var create = document.createElement('iframe');
			var elem = obj.appendChild(create);
			elem.id = frameName;
			elem.style.position = 'absolute';
			elem.style.top = obj.offsetTop+'px'; 
			elem.style.left = obj.offsetLeft+'px';
			elem.style.width = create.offsetWidth+'px'; 
			elem.style.height = create.offsetHeight+'px';
			elem.style.filter = 'alpha(opacity=0);';
			elem.style.border = '10px';
			elem.style.zIndex = -20;
		}
	}
	
});